You are now ready to estimate the changing magnitude of an actual variable star. Print the page to plot your magnitude estimations on the graph provided. Place the transparency over each one of the seven Field Slides of W Cyg and record your estimated magnitudes directly onto the graph above the corresponding Julian Day (JD).

Study the resulting light curve. What are the maximum and minimum magnitudes for W Cyg? How many cycles are represented? Can you determine the period? Is this a Cepheid variable star?